Coupling activity of ionic liquids between diene elastomers and multi-walled carbon nanotubes

Das, Amit; Stöckelhuber, Klaus Werner; Jurk, René; Fritzsche, Juliane; Klüppel, Manfred; Heinrich, Gert

doi:10.1016/j.carbon.2009.07.052

Cited by 136 publications

(112 citation statements)

References 33 publications

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“…The cation-p interactions between the BmiTFSI and tubes resulted in uniform dispersion of MWCNTs and the formation of their percolating network, which significantly increased the conductivity of the rubber composite. Similar results were achieved for a blend of carbon nanotubes in a solution-SBR and polybutadiene rubber [17]. The best activity was exhibited by AMICl-the ionic liquid with a double bond in the cation.…”

Section: Introductionsupporting

confidence: 78%

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

Maciejewska

Zaborski

2018

Polym. Bull.

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The aim of this work was to study the activity of several alkylimidazolium salts of bis(trifluoromethylsulfonyl)imides to obtain a very fast vulcanization of the butadiene-styrene (SBR) elastomer. Ionic liquids (ILs) such as alkylimidazolium salts with ethyl-, propyl-, butyl-, hexyl-, decyl-, dodecyl-, and hexadecyl chains in the cation together with nanosized zinc oxide are used to develop elastomer composites with very short vulcanization time and a reduced amount of vulcanization activator. In this article, we discuss the effect of the ILs with respect to the length of alkyl chain in their cation on the vulcanization kinetics of rubber compounds. The influence of ILs on the crosslink density as well as the mechanical properties of the vulcanizates and their resistance to thermo-oxidative and UV aging were also studied. ILs resulted in a shortened optimal vulcanization time and reduced the onset vulcanization temperature compared to zinc oxide containing rubber compound. This is very important from a technological point of view. A considerable increase in the crosslink density of vulcanizates was also observed.

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Section: Introductionsupporting

confidence: 78%

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

Maciejewska

Zaborski

2018

Polym. Bull.

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“…Fukushima and Aida [8] reported that imidazolium ionic liquids can be used to disperse single-walled carbon nanotubes in soft composite materials. The ability of ionic liquids to functionalise and improve the dispersion of carbon nanotubes has been intensively studied [9,10] also in diene elastomers [11]. Ionic liquids resulted in the development of a conductive polychloroprene rubber containing a low concentration of multi-walled carbon nanotubes (MWCNTs) [12,13].…”

Section: Introductionmentioning

confidence: 99%

Effect of ionic liquids on the dispersion of zinc oxide and silica nanoparticles, vulcanisation behaviour and properties of NBR composites

Maciejewska¹,

Zaborski²

2014

Express Polym. Lett.

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Abstract. The aim of this work was to study the activity of several alkylpyrrolidinium, alkylpyridinium, alkylpiperidinium and benzylimidazolium ionic liquids (ILs) for the purpose of improving the dispersion degree of vulcanisation activator and filler nanoparticles in the acrylonitrile-butadiene elastomer (NBR). The effect of the ionic liquids on the vulcanisation kinetics of the rubber compounds, crosslink density and mechanical properties of the vulcanisates and their resistance to thermo-oxidative and UV ageing was studied. The use of ionic liquids allowed for a homogeneous dispersion of nanoparticles in the elastomer without detrimental effects on the vulcanisation process. The physical properties and the thermal stability of the obtained vulcanisates were significantly improved. Ionic liquids increased the crosslink density of the vulcanisates and their damping properties. Pirydinium and piperidinium hexafluorophosphates were most effective at increasing the crosslink density and improving the properties of NBR composites.

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“…Additionally, the intertubular contacts are increased. It has been recently discussed that the Van der Waals attraction among the tubes decreases due to cationpi interaction between ILs and CNTs in modified tubes [10,11]. This leads to disentanglement of CNTs that in turn increased the dispersion and the formation of a highly conductive CNT network.…”

Section: Experimental and Methodsmentioning

confidence: 99%

“…In previous papers, the conductivity of MWCNT/ rubber composites was found to be increased by applying imidazolium type ionic liquids as dispersion agent [10,13,14]. A chemical coupling between CNTs and the rubber matrix mediated by imidazolium type ionic liquids and sulfur bridges can be achieved in SSBR-BR/CNT systems [14] as depicted in Figure 1.…”

Section: Introductionmentioning

confidence: 92%

“…For special conductive carbon blacks the threshold can even go down to 3 vol% [7]. Recently, also single walled CNT and multi walled carbon-nanotubes (MWCNT) have been applied as conductive fillers for reaching the necessary conduction level [8][9][10][11]. Compared to carbon black, the percolation threshold of MWCNT is significantly lower due to the high aspect ratio of the tubes.…”

Section: Introductionmentioning

confidence: 99%

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Influence of ionic liquids on the dielectric relaxation behavior of CNT based elastomer nanocomposites

Das¹,

Steinhauser²,

Klueppel³

et al. 2012

Express Polym. Lett.

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Abstract. The influence of an imidazolium type ionic liquid (IL) on the relaxation behavior of carbon-nanotube (CNT) based polychloroprene nanocomposites prepared by melt mixing has been investigated by broadband dielectric spectroscopy. It is demonstrated that the presence of the ionic liquid modifies the relaxation behavior of the pure rubber matrix and leads to a significant increase of the conductivity for the CNT/rubber composites. For the unfilled rubber, a distinct glass transition of the IL is observed for high concentrations demonstrating that the IL forms a separate phase. The increased conductivity of the CNT-filled rubber composites is related to a physical coupling between CNTs and rubber matrix mediated by IL leading to a better dispersion of the CNTs.

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Coupling activity of ionic liquids between diene elastomers and multi-walled carbon nanotubes

Cited by 136 publications

References 33 publications

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

Ionic liquids as coagents for sulfur vulcanization of butadiene–styrene elastomer filled with carbon black

Effect of ionic liquids on the dispersion of zinc oxide and silica nanoparticles, vulcanisation behaviour and properties of NBR composites

Influence of ionic liquids on the dielectric relaxation behavior of CNT based elastomer nanocomposites

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